VENICE Central Pavilion and Arsenale It could be said that Rugoff’s eschewal of a general theme has a Whitmanesque ambition to “contain multitudes,” letting the rooms swell with the unmediated voices of the artists, every object a megaphone. Yet the question in producing behemoth exhibitions like this is always the same in terms of the number of artists and works: How many? The answer is also always the same: as many as the space will bear.